103.2 was a much bigger speaker, I think the P60 was a professional, more advanced version of the 103.2 for monitoring work?

Do you mean perhaps the 101? This was much more a 3/5a replacement, much flatter in response and higher power handling and less lumpy bass? Never took off to the same reputation as the little BBC speaker though, even though 3/5s problems of manufacture were legion with the special selection of B110s, and later their drift requiring a redesign to the so-called 11 ohm version.

I did install some 103|2s in a BBC outside broadcast (OB) van once, when the LS3/5A was not considered loud enough. They were supplied with a KUBE type bass extending circuit. I think they were used to monitor the 1st Live Aid concert. That being a one off occasion, afaik they were never used again.